.wrapper{
  width: 100%;
  display: flex;
  justify-content: center;
  .main{
    max-width: 960px;
    width: 100%;
    height: 800px;
    header{
      overflow: hidden;
      border-bottom: 1px solid #DDD;
      line-height: 48px;
      h1{
        margin: 0;
        float: left;
        font-size: 22px;
        font-weight: 600;
      }
      .menu{
        float: right;
        font-size: 16px;
      }
    }
  }
}
